We consider it necessary______Tom should improve his behavior.

We consider ______ the instrument be adjusted each time it is used.

A．that it necessary

B．it necessary that

C．necessary that

D．necessary of it that

Under no circumstances ______ to Guilin for the holiday.

A．we can consider to go

B．can we consider to go

C．we can consider going

D．can we consider going

A.question

B.suspicion

C.suggestion

D.proposal

We do appreciate it that you consider A & C Co.Ltd.as a reliable supplier.（)

A.do

B.appreciate it

C.consider

D.a reliable supplier

ct with each other. Formal written rules are often laws and they control how we drive operate a business, or run a government. Individuals who disobey laws may be fined or put in jail. Because illegal behavior. generally harms other individuals or societies at large. Our court system must punish people who don't obey these formal rules.

Informal rules, often called "manners", describe correct and incorrect behavior. in such situations as eating in a restaurant, going on a date, or working in an office. If one is impolite or misbehaves in these situations, other people often consider offender insensitive. And although we can strongly disagree to such misconduct, we can no legally punish someone for simply being inconsiderate or unpleasant.

Neither laws nor manners are inflexible; both changes as society develops. For example, in the early twentieth century, the selling of strong spirits was forbidden. This law, however, had to be changed because the government found it impossible to force people to drink only soft drinks. More recently, many people who were dissatisfied with the unequals between the rights of men and women worked to pass the equal rights law, as women became more independent and took on new roles, a new law was considered necessary to reflect that change.

According to the passage, people who offended the law may be ______.

A．put to death

B．put on afire

C．doing fine

D．put into prison

only for the purpose of educating them; our purpose is to prepare them for life. As soon as we realize this fact, we will understand that it is very important to choose a system of education which will really prepare children for life. It is not enough just to choose the first system of education one finds, or to continue with one's old system of enducation without examining it to see whether it is in fact suitable or not.

In many modem countries it has for some time been fashionable to think that, by free education for all-whether rich or poor, clever or stupid--one can solve all the problems of society and build a perfect nation. But we can already see that free education for all is not enough; we find in such countries a far larger number of people with university degrees than there are jobs for them to fill. Because of their degrees, they refuse to do what they consider" low" work; and, in fact, work with the hands is thought to be dirty and shameful in such countries.

But we have only to think a moment to understand that the work of a completely uneducated farmer is far more important than that of a professor, We can live without education, but we die if we have no food. If no one cleaned our streets and took the rubbish away from our houses, we would have terrible diseases in our towns. In countries where there are no servants because everyone is ashamed to do such work, scientists have to waste much of their time doing housework.

In fact, when we say that all of us must be educated to prepare for life, it means that we must be educated in such a way that, firstly, each of us can do whatever job is suited to his brain and ability and, secondly, that we can realize that all jobs are necessary to society, and it is very bad to be ashamed of one's work, or to scorn someone else's. Only such a type of education can be called valuable to society.

Education is ______.

A．a means

B．a purpose

C．fashionable

D．the first system

d destroy life as we know, say some scientists.

Asteroids are different forms of the meteoroids that race across the night sky. Most orbits the sun far from Earth and don't threaten us. But there are also thousands of asteroids whose orbits put them on a violent coming course together with Earth.

Buy $ 50 million worth of new telescopes right now. Then spend $10 mil]ion a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we'll have a way to change its course.

Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn't be cheap.

Is it worth it？ Two things experts consider when judging any risk are: 1) How likely the event is; and 2) How bad the consequences if the event occurs. Experts think asteroids big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall it would be the end of the world. "If we don't take care of these big asteroids, they'll take care of us. "Says one scientist. "Its that simple."

The cure, though, might be worse than the disease, Do we really want fleets of nuclear weapons silting around on Earth？ "The world has less to fear from doomsday rocks than from a great nuclear fleet set against them. "Said a New York Times article.

What does the passage say about asteroids and meteoroids？

A．They are heavenly bodies similar in nature.

B．There are more asteroids than meteoroids.

C．They are heavenly bodies different in composition.

D．Asteroids are more mysterious than meteoroids.

h affects the environment in two ways. Firstly, the limited energy resources will be used up much faster. Secondly, the increasing population creates more pollution, another severe problem that needs to be solved: Both problems are long-term ones because actions taken now show their results slowly over many years. They are also urgent because delays in action can lead to great suffering and social problems. The question seems to be difficult to handle for most people. However, a person can be a protector of environment in everyday life if he takes actions to save the environment right now. With the development of technology, cars make transportation easier and quicker than before, but we can't ignore the disadvantages brought to us by more and more cars in use. For example, we are consuming gasoline(汽油), which is a non-renewable (无法更新的)resource, and will soon be gone. Moreover, the exhausted gas from cars pollutes our air, and our health is therefore threatened by air pollution, which has a big potential effect on our daily life. So we can consider walking, taking buses, carpooling(合用汽车) instead of driving cars alone. This seems to be a very slow process that can't be so effective if it's taken by a single person. But when more and more people become aware of the importance and positively take it as their personal responsibilities, the condition of the air will be improved to a great extent.

According to the writer, the main problem to our environment today is______.

A．the increase of population

B．the limited energy resources

C．the more serious air pollution

D．the development of technology

根据以下内容回答题：

It is Dredicted that there will be four scientific breakthroughs in the 21 st centruy． We wiuknow where we came from．Since the l920s，scientists have known the universe is expanding，which means it must have started at a definite time in the past．They even have de-veloped theories that give a detailed picture of the universe from the time it was a fraction of a second old to the present．Over the next couple of decades，these theories will be improved by data from powerful new telescopes． We will find out the genetic code and conquer cancer．In l9th century operas，when the heroine coughs in the first act，the audience knows"she will die of tuberculosis in the third act．

But thanks to 20th century science，the once deadly disease now means nothing more serious than taking some pills．As scientists learn more about the genetic code and the way cells work，many serious desease——cancer．will become less threatening． We will live longer，probably up to 1 20 years．If the normal aging process is basically a fierce．invisible contest in our ceus——a contest between damage to our DNA and our ceils’abili-ty to repair that damage，gre{at progress around．But before we push scientists to do more，we should consider：do we really want to live in a world where no one grows old？We will haye a hrain road map．This is the real final frontier of the 21 st century．The brain is the most complex system we know．It contains about l00 billion nerve cells，each con-nected to as many as l000 0thers．Early in the 21 st century，progress in science will make it Dossible to produce detailed images of the nerve cells in operation．We will be able to say with certainty which ones are working when you read or think about a word．

Jadging from the second paragraph，the writer thinks of present theories about the uinverse as __________．

A.perfect

B.imperfect

C.groundless

D.complicated

ing impacts as well. "The e-book promises to wreak a slow havoc (浩劫) on life as we know it," Jason Ohler, professor of technology assessment (评估), university of Alaska Southeast In Juneau, warned the World Future Society, Bethesda, Md. His assessment weighed the pros and cons (赞成和反对的理由) of e-book technology's impact on social relationships, the environment, the economy, etc. Before you curl up (蜷曲) with an e-book, consider the disadvantages.

They increase eyestrain due to poor screen resolution, replace a relatively cheap commodity with a more expensive one, and displace workers in print book production and traditional publishing. E-books make it easy to share data, thereby threatening copyright agreements and reducing compensation of authors, as well as creating nonbiodegradable (不可生物降解的) trash.

On the other hand, e-books save paper and trees, reduce the burden of the carrying and storing of printed books, promote self-sufficiency in learning, and make reading a collaborative experience online. They also create new jobs for writers and artists and encourage self-publishing.

In final analysis, Ohler points out, e-books should gain society's approval if a few conditions are met: make them biodegradable and recyclable, solve the problem of eye fatigue (疲劳), be sure the "have-nots" get the technology, and support e-book training in schools and business.

What is the author's purpose of writing the passage？

A．Draw people's attention to the disadvantages of e-books.

B．Call on people to reject e-books.

C．Criticize schools and business that don't provide e-books.

D．Encourage people to use e-books.

first steamship in Canada(then called British North America)in 1809. By the 1830s dozens of steam vessels were in use in Canada. They offered the traveler reliable transportation in comfortable facilities--a welcome alternative to stagecoach travel which at the best of times could only be described as wretched. This commitment to dependable river transport became entrenched with the investment of millions of dollars for the improvement of waterways, which included the construction of canals and lock systems. The Lachine and Welland Canals, two of the most important systems, were opened in 1825 and 1829, respectively. By the time that Upper and Lower Canada were united into the Province of Canada in 1841 ,the public debt for canals was more than one hundred dollars per capita, an enormous sum for the time. But it may not seem such a great amount if we consider that improvements allowed steamboats to remain practical for most commercial transport in Canada until the mid-nineteenth century.

What is the main purpose of the passage？

A．To contrast travel by steamship and stagecoach.

B．To criticize the level of public debt in nineteenth century in Canada.

C．To describe the introduction of steamships in Canada.

D．To show how Canada surpassed the United States in transportation improvements.